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[Solved] Combo box selected item reloads a null value

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ComboBox

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Cameron Adams asked on 17 Sep 2009, 10:19 AM

I'm having a really hard time working this out so I'm hoping someone can slap me, tell me I'm stupid and point me in the right direction. I've got a RadComboBox loading into a Column a Telerik GridView. The item source for the combo box is loading from a collection which is a static resource. What I'm seeing is that the control loads correctly, including loading the correct selected item, then it refreshes and the selected item becomes null. I'm not up-to-speed with the silverlight control lifecycle so I've got no idea what's going on.

    
            <telerikGridView:GridViewDataColumn IsReadOnly="True" Width="Auto" Header="Acquisition Method" DataMemberBinding="{Binding AcquisitionMethodID}"> 
        
                                <telerikGridView:GridViewDataColumn.CellTemplate> 
        
                                    <DataTemplate> 
        
                                            <telerikInput:RadComboBox x:Name="AcqMethod"  
        
                                                                      Loaded="RadComboBox_Loaded"  
        
                                                                      IsReadOnly="True" 
        
                                                                      HorizontalAlignment="Left"  
        
                                                                      VerticalAlignment="Top"  
        
                                                                      Width="167"  
        
                                                                      ItemsSource="{Binding Mode=OneWay, 
        
                                                                                        Source={StaticResource CodeTables}, 
        
                                                                                        Path=AcquisitionMethod}" 
        
                                                                      SelectedValuePath="AcquisitionMethodID"  
        
                                                                      SelectedValue="{Binding Mode=TwoWay, 
        
                                                                                        Path=AcquisitionMethodID}"  
        
                                                                      DisplayMemberPath="AcquisitionMethod"/> 
        
                                        </DataTemplate> 
        
                                    </telerikGridView:GridViewDataColumn.CellTemplate> 
        
                                </telerikGridView:GridViewDataColumn>

Any help would be very welcome.
Thanks
Cam

1 Answer, 1 is accepted

answered on 23 Sep 2009, 09:37 AM

silverlightapplication1.zip

Hi Cam,

I created a simple application that demonstrates my understanding of your problem, please, find it attached. However, it seems that it works properly with the latest internal build (that is not released yet). Am I doing something wrong? You could also try to upgrade the assemblies in your application with the latest internal build available and see if it works, because the problem could be caused by a bug that has been already fixed. I also saw that you have a handler for the Loaded event in RadComboBox - it could contain code that causes the problem, if the upgrade and my application did not help, I would like to see what's in this handler.

Greetings,
Valeri Hristov
the Telerik team

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